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Fix warning in setjmp/jmpbug.c.

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This patch fixes a "set but not used" warning in setjmp/jmpbug.c.  A
variable is used only to store the result of alloca.  A cast to void
is added to avoid the warning, and the variable is made volatile to
ensure the call to alloca isn't optimized away for being unused.

Tested for x86_64.

	* setjmp/jmpbug.c (test): Make foo volatile and cast it to
	void.
This commit is contained in:
Joseph Myers
2014-11-26 00:45:19 +00:00
parent 439e1ad6d0
commit c82f5c0ce5
2 changed files with 7 additions and 1 deletions
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5
ChangeLog
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@@ -1,3 +1,8 @@
2014-11-26 Joseph Myers <joseph@codesourcery.com>
* setjmp/jmpbug.c (test): Make foo volatile and cast it to
void.
2014-11-25 Joseph Myers <joseph@codesourcery.com> 2014-11-25 Joseph Myers <joseph@codesourcery.com>
* stdio-common/tst-printf-round.c (test_hex_in_one_mode): Make * stdio-common/tst-printf-round.c (test_hex_in_one_mode): Make

3
setjmp/jmpbug.c
View File

@@ -14,7 +14,7 @@ static void
test (int x) test (int x)
{ {
jmp_buf buf; jmp_buf buf;
char *foo; char *volatile foo;
int arr[100]; int arr[100];
arr[77] = x; arr[77] = x;
@@ -25,6 +25,7 @@ test (int x)
} }
foo = (char *) alloca (128); foo = (char *) alloca (128);
(void) foo;
sub5 (buf); sub5 (buf);
} }